Accession Number:
ADD014619
Title:
Optical Fiber Refractometer.
Descriptive Note:
Patent application, Filed 3 Jan 90,
Corporate Author:
DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s):
Report Date:
1990-01-03
Pagination or Media Count:
23.0
Abstract:
The index of refraction of a liquid is measured using an optical fiber refractometer having a light transmitting optical fiber by immersing a portion of the optical fiber in the liquid and launching light into one end of the optical fiber at a selected non-zero launch angle with respect to the fiber axis. Light transmitted through the optical fiber is detected at the other end of the optical fiber and a determination is made of the index of refraction of the liquid in accordance with the detected light and the selected non-zero launch angle. By varying the launching angles of the light the range of the refractometer is increased. The light transmitting optical fiber is provided with a region having at least one tapered portion for further increasing the range of the refractometer. The tapered portion of the optical fiber is disposed between a reflective end of the optical fiber and the light source for providing single-ended operation. Keywords Patent applications. rh
Descriptors:
Subject Categories:
- Test Facilities, Equipment and Methods
- Optics